Toyota Tundra. Manual — part 1520

MONITOR STRATEGY

MONITOR STRATEGY

TYPICAL ENABLING CONDITIONS

P0037 and P0057

TYPICAL ENABLING CONDITIONS - P0037 AND P0057

P0038 and P0058 (Condition A)

TYPICAL ENABLING CONDITIONS - P0038 AND P0058 (CONDITION A)

P0038 and P0058 (Condition B)

Related DTCs

P0037: Heated oxygen sensor heater (for Bank 1) range check (Low
electrical current)
P0038: Heated oxygen sensor heater (for Bank 1) range check (High
electrical current)
P0057: Heated oxygen sensor heater (for Bank 2) range check (Low
electrical current)
P0058: Heated oxygen sensor heater (for Bank 2) range check (High
electrical current)
P0141: Heated oxygen sensor heater performance (for Bank 1)
P0161: Heated oxygen sensor heater performance (for Bank 2)

Required Sensors/Components
(Main)

Heated oxygen sensor heater

Required Sensors/Components
(Related)

-

Frequency of Operation

Continuous: P0037, P0038, P0057 and P0058
Once per driving cycle: P0141 and P0161

Duration

0.5 seconds: P0037 and P0057
1 second: P0038 and P0058 (Condition A)
2.048 seconds: P0038 and P0058 (Condition B)
10 seconds: P0141 and P0161

MIL Operation

Immediate: P0037, P0038, P0057 and P0058
2 driving cycles: P0141 and P0161

Sequence of Operation

None

Monitor runs whenever following DTCs not present

None

Battery voltage

10.5 to 20 V

Monitor runs whenever following DTCs not present

None

Battery voltage

10.5 V or more

Engine

Running

Starter

OFF

2009 Toyota Tundra

2009 ENGINE PERFORMANCE Engine Control System (3UR-FBE) - Tundra

TYPICAL ENABLING CONDITIONS - P0038 AND P0058 (CONDITION B)

P0141 or P0161 (Condition A)

TYPICAL ENABLING CONDITIONS - P0141 AND P0161 (CONDITION A)

P0141 or P0161 (Condition B)

TYPICAL ENABLING CONDITIONS - P0141 AND P0161 (CONDITION B)

TYPICAL MALFUNCTION THRESHOLDS

P0037 and P0057:

TYPICAL MALFUNCTION THRESHOLDS - P0037 AND P0057

P0038 and P0058 (Criteria A):

TYPICAL MALFUNCTION THRESHOLDS - P0038 AND P0058 (CRITERIA A)

P0038 and P0058 (Criteria B):

TYPICAL MALFUNCTION THRESHOLDS - P0038 AND P0058 (CRITERIA B)

P0141 or P0161:

TYPICAL MALFUNCTION THRESHOLDS - P0141 OR P0161

COMPONENT OPERATING RANGE

Monitor runs whenever following DTCs not present

None

Battery voltage

10.5 to 20 V

Monitor runs whenever following DTCs not
present

P0037, P0038, P0057, P0058 (Rear Oxygen Sensor
Heater)

All of following conditions met:

-

Battery voltage

10.5 V or more

Fuel cut

OFF

Time after fuel cut ON to OFF

30 seconds or more

Accumulated heater ON time

100 seconds or more

Monitor runs whenever following DTCs not present

None

Duration that rear heated oxygen sensor impedance is less than 15 kohms

2 seconds or more

Heater current

Less than 0.3 A

Learned heater OFF current

More than 2 A

Hybrid IC high current limiter port

Fail

Accumulated heater resistance Varies with sensor element temperature (Example: More than 23 ohms)

2009 Toyota Tundra

2009 ENGINE PERFORMANCE Engine Control System (3UR-FBE) - Tundra

COMPONENT OPERATING RANGE

WIRING DIAGRAM

Refer to DTC P0136 .

CONFIRMATION DRIVING PATTERN

These DTCs are stored when the engine idles for 110 seconds or more.

INSPECTION PROCEDURE

HINT:

Sensor 2 refers to the sensor mounted behind the Three-Way Catalytic Converter (TWC) and located far from
the engine assembly.

Read freeze frame data using the Techstream. Freeze frame data records the engine condition when
malfunctions are detected. When troubleshooting, freeze frame data can help determine if the vehicle was
moving or stationary, if the engine was warmed up or not, if the air-fuel ratio was lean or rich, and other data
from the time the malfunction occurred.

1. INSPECT HEATED OXYGEN SENSOR (HEATER RESISTANCE)

a. Disconnect the D31 or D32 HO2 sensor connector.

Heated Oxygen (HO2) sensor
heater current

0.4 to 1 A (when engine idles, HO2 sensor warmed up and battery
voltage 11 to 14 V)

2009 Toyota Tundra

2009 ENGINE PERFORMANCE Engine Control System (3UR-FBE) - Tundra

Fig. 58: Identifying Terminals Of D31 Or D32 HO2 Sensor Connector
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

b. Measure the resistance according to the value(s) in the table below.

Standard resistance

RESISTANCE SPECIFIED CONDITION

NG: REPLACE HEATED OXYGEN SENSOR (See REMOVAL )

OK: Go to next step.

2. CHECK TERMINAL VOLTAGE (+B OF HO2 SENSOR)

a. Disconnect the D31 or D32 HO2 sensor connector.

Fig. 59: Identifying Terminals Of D31 Or D32 HO2 Sensor Connector
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

b. Turn the ignition switch to ON.

c. Measure the voltage according to the value(s) in the table below.

Tester Connection Condition Specified Condition

1 (HT1B) - 2 (+B) 20°C (68°F)

11 to 16 ohms

1 (HT1B) - 4 (E1)

Always

10 kohms or higher

1 (HT2B) - 2 (+B) 20°C (68°F)

11 to 16 ohms

1 (HT2B) - 4 (E1)

Always

10 kohms or higher

2009 Toyota Tundra

2009 ENGINE PERFORMANCE Engine Control System (3UR-FBE) - Tundra